OPTICAL AND STRUCTURAL PROPERTIES OF COPPER ALUMINUM DISELENIDE (CUALSE2) COMPOUND THIN FILMS
ABSTRACT
A low cost chemical bath deposition technique has been used for the preparation of Copper aluminum diselenide (CuAlSe2) thin films onto commercial microscope glass substrates. The values of deposition parameters were varied such as temperature (50-70oC), deposition time (12 — 60hrs), volume of complexiing agent (1-9ml) and bath pH (8.35 — 10.10) to obtain good quality thin films. The optical, structural and morphological properties of thin films were studied by Jenway Software 6405 UV — VIS Spectrophotometer, X-ray minidiffractometer MD — 10 and Scanning Electron Microscopy (SEM) studies respectively.
The optical property revealed that CuAlSe2 films have energy band gaps range value at room temperature and elevated temperature as 2.22 — 2.58eV and 2.00 — 2.14eV respectively. The X-ray diffraction study showed that the CuAlSe2 films were polycrystalline in nature with the preferential orientation along the (112) plane. The Scanning Electron Microscopy results indicated that the films were smooth, uniform and the substrate surface was covered completely at these experimental conditions.
CHAPTER ONE
1.1 Introduction
… This chapter will address the background information that motivated this study, the challenges that prompted it, its aim, and its objectives as a preface to subsequent sections of the study. Additional factors include the study's significance, scope, limitations, research questions and hypotheses, and the definition of technical terms.
CHAPTER TWO
2.0 Literature Review
2.1 Introduction
The review of relevant literature is the main topic of this chapter. A literature review covers theoretical and methodological contributions to a certain issue in addition to the state of knowledge at the time of writing. It provides information about the state of the art in relation to the subject you are writing about. It examines the body of work on the chosen subject. The literature evaluation in this study comprises the …
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